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DURO-GUARD ISO III CG

FLAT AND TAPERED PANELS

Description:
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Duro-Guard ISO III CG is a closed-cell
polyisocyanurate foam core insulation board with an
integrally laminated, heavy, durable and
dimensionally stable coated-glass facer which is
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compatible with Duro-Last roof membranes.
 Available in both flat and tapered panels in
order to meet thermal insulation needs as well
as provide slope for proper roof drainage.
Figure 1. Duro-Guard ISO III CG Flat On Steel Deck
 Manufactured with a blowing agent that has
zero ozone depletion potential (ODP) and Flat Panels:
virtually no global warming potential (GWP).  Available sizes:
 Approved for direct application to steel and o 4 ft. x 4 ft.
other deck types.
o 4 ft. x 8 ft.
 Available in two grades of compressive o Thicknesses: 1 to 4 inches.
strength per ASTM C 1289.
o Type II, Class 2, Grade 2 (20 psi).  Refer to Table 2 for R-value and flute
spanability.
o Type II, Class 2, Grade 3 (25 psi).
Tapered Panels:
 Refer to Table 3 for physical properties.
 Available sizes:
Recommended Uses:
o 4 ft. x 4 ft.
 Mechanically attached Duro-Last roof systems. o Thicknesses: ½ to 4-½ inches.
 Adhered/Fully Bonded Duro-Last roof systems.  Precut miters and crickets are also available.
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 Duro-Bond roof systems.  Taper designs and shop drawings available.
 Metal retrofit roof systems.
Underwriters Laboratories, Inc. Classifications:
 In some cases, use of this product may result
in a Class A or B fire rating over a combustible
deck without the use of a fire rated slip sheet or
board. Refer to Duro-Last’s UL Listings
(TGFU.R10128) for assembly details.
 UL 1256, UL 790.
 Insulated Metal Deck Constructions:
o No. 120, 123, 292. Figure 2. Duro-Guard ISO III CG Taper
 UL 263 Hourly Rated P Series Roof TABLE 1. TYPICAL TAPER PANEL DIMENSIONS
Assemblies. ID SLOPE* SIZE MIN MAX
 UL Classified for use in Canada. Q ½” per ft. 4% 4 ft. x 4 ft. ½” 2-½”
QQ ½” per ft. 4% 4 ft. x 4 ft. 2-½” 4-½”
Factory Mutual Approvals: X ¼” per ft. 2% 4 ft. x 4 ft. ½” 1-½”
Y ¼” per ft. 2% 4 ft. x 4 ft. 1-½” 2-½”
 FM 4450, FM 4470. G ¼” per ft. 2% 4 ft. x 4 ft. 1” 2”
 Approved for Class 1 insulated steel, wood, H ¼” per ft. 2% 4 ft. x 4 ft. 2” 3”
concrete and gypsum roof deck construction. AA ⅛” per ft. 1% 4 ft. x 4 ft. ½” 1”
A ⅛” per ft. 1% 4 ft. x 4 ft. 1” 1-½”
 Refer to FM Approval’s RoofNav for details on B ⅛” per ft. 1% 4 ft. x 4 ft. 1-½” 2”
FM Approved systems (www.roofnav.com). C ⅛” per ft. 1% 4 ft. x 4 ft. 2” 2-½”
* Contact Duro-Last for additional slope options.

www.duro-last.com 1 of 2 800-248-0280

Duro-Last, “World’s Best Roof”, Duro-Bond, Duro-Grip and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 10/30/2013, 03/31/2014, 07/27/2016